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9
Installing Sanding Discs
1. Unplug tool and place it upside down on a level
surface as shown. Remove any accessories from
spindle.
2. Thread nylon washer onto spindle. Attach
backing pad and sanding disc using Fig. 6
to determine type and order of assembly.
Fig. 6
Spindle lock button
Spindle
Backing
pads
A. Polypropylene
B. Spiral
C. Rubber
D. Phenolic
Disc nut
Sanding
disc
Nylon washer
Rubber
pad
Type 27
fl ange
Flap disk Flap disk with hub
B
CDA
Disc nut position
USING SANDING DISCS
NOTE: When installing fl ap disc without hub,
position disc nut as shown.
3. To tighten, press the spindle lock button while
turning disc nut clockwise.
4. To remove sanding disc and backing pad, unplug
tool and reverse procedure.
Removing Welds or Hammer Marks
When removing welds or hammer marks, limit
coarse sanding to the immediate area. Use suc-
cessively fi ner grits to smooth surface.
Cross Sanding
When finishing a surface that has been pre-
pared by a coarse disc or wheel, sand at right
3. Use long, sweeping, side to side strokes, advanc-
ing forward to produce the desired fi nish.
Sanding
1. Use a clamp, vise or other practical means to
hold your work, freeing both hands to control your
tool. Firmly grasp rear handle and side handle
before starting and while tool is in operation.
Allow sanding disc to come to full speed before
beginning to sand.
2. Hold tool at 5° to 15° angle as shown to ensure
proper sanding pressure and control (Fig. 7). Too
great an angle will result in too much pressure
and could cause excessive wear to the disc and
workpiece. Too small an angle will reduce control.
Hold at a 5° to 15° angle
Fig. 7
For best results use only
this portion of disc
angles to the strokes made by the coarser disc.
Finishing marks left from previous sanding are eas-
ily seen and removed for a uniform fi nish. Failure
to cross sand when changing from a coarse disc to
a fi nishing disc may result in deep scratches and
circular marks.
Selecting Sanding Discs & Grit
Refer to the table below to select the correct type
of sanding disc for your job. Generally, use 16, 24
or 36 grit for heavy stock removal; 50, 60 or 80 grit
for medium stock removal and 120 grit for fi nishing.
Always begin with a coarse grit, using successively
fi ner grits to obtain the desired fi nish. See Catalog
for a complete list of MILWAUKEE sanding discs.
Finishing Metal
Constantly move across the surface. Work faster on
curved surfaces where contact areas are smaller
and pressure is greater. Flat areas may appear at
the end of the stroke when pressure is too heavy.
Ease up on pressure at end of each stroke and
when reversing strokes.
Troubleshooting
Deep scratches and circular marks can result from:
• Using too coarse a grit
• Using a partially glazed disc
• Dirt or loose metal on the workpiece
• Failure to sand across the grain when changing
from coarse to fi nishing discs
Bluish discoloration of metal surface indicates:
• Excessive heat caused by circular motion in a
small area
• Excessive pressure
• Use of worn out or glazed discs